And is there any chance that such concoctions might yield the promised results?

I think the male bias could serve adaptive value for Toxoplasma. In polygynous mammals, it is known that male offspring disperse further distance than females. Since Toxoplasma can be transmitted vertically, the male biased sex ratio of host’s offspring may help its dispersion. In addition, dispersing individuals are more often exposed to predators. Toxoplasma alters the sex of intermediate host’s offspring for finding new habitats and new hosts?

Curiouser and curiouser.

Countries with largest number of boys per 100 girls:

China 112
South Korea 108
Portugal 107
Spain 107
Italy 107
While in China one could argue for some political/cultural bias, that is unlikely in southern European countries. I don’t know about Korea.

It doesn’t seem to be a mediterranean thing:
Algeria 105
Morocco 105
Egipt 105
Libya 105

Some other countries
Russia 106
Greece 106
Germany 106
USA 105
UK 105
France 105
Brazil 105
Mexico 105
Angola 105
India 105

France and Brazil are among the highest rates of infection, yet they rank with the lowest boy ratios.

(values from the cia factbook, I’m not sure how reliable they are).

If we say that 1.2 billion people are infected (20% of the world’s population), and those infections are distributed equally among men and women, then 20% of the population should have 72% boys and the other 80% should have 51% boys, leading to an overall boy birthrate of 55%. Further, countries like Brazil (which you say has an infection rate of 66.9% in your other post) should have boy birthrates of 65%. (In contrast, wikipedia says Brazil’s boy birthrate is 1.05 male(s)/female, which is 51.2% boys.)

(Wait, I think I might’ve found the answer. You state that “Infection with the parasite raises the chances a woman will have a boy from 51% to 72%.” But, the Guardian article actually says, “They discovered that women whose antibody count was high – suggesting a substantial infection – had a much higher chance of having baby boys. In most populations the birth rate is around 51% boys, but women infected with toxoplasma had up to a 72% chance of a boy.” Note the phrases: “whose antibody count was high” rather than simply “infected” and “up to a 72% chance of a boy” rather than “Infection … raises the chances … from 51% to 72%.”)